340123211 has 2 divisors, whose sum is σ = 340123212. Its totient is φ = 340123210.

The previous prime is 340123193. The next prime is 340123213. The reversal of 340123211 is 112321043.

It is a strong prime.

It is an emirp because it is prime and its reverse (112321043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340123211 - 2¹⁰ = 340122187 is a prime.

Together with 340123213, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340123211.

It is not a weakly prime, because it can be changed into another prime (340123213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170061605 + 170061606.

It is an arithmetic number, because the mean of its divisors is an integer number (170061606).

Almost surely, 2^340123211 is an apocalyptic number.

340123211 is a deficient number, since it is larger than the sum of its proper divisors (1).

340123211 is an equidigital number, since it uses as much as digits as its factorization.

340123211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 340123211 is about 18442.4296392856. The cubic root of 340123211 is about 698.0375038346.

Adding to 340123211 its reverse (112321043), we get a palindrome (452444254).

The spelling of 340123211 in words is "three hundred forty million, one hundred twenty-three thousand, two hundred eleven".